NAME¶
plparseopts - Parse command-line arguments
SYNOPSIS¶
int
plparseopts(
p_argc,
argv,
mode)
DESCRIPTION¶
Parse command-line arguments.
plparseopts(3plplot) removes all recognized flags (decreasing argc
accordingly), so that invalid input may be readily detected. It can also be
used to process user command line flags. The user can merge an option table of
type PLOptionTable into the internal option table info structure using
plMergeOpts(3plplot). Or, the user can specify that ONLY the external
table(s) be parsed by calling
plClearOpts(3plplot) before
plMergeOpts(3plplot).
The default action taken by
plparseopts(3plplot) is as follows:
Returns with an error if an unrecognized option or badly formed option-value
pair are encountered.
Returns immediately (return code 0) when the first non-option command line
argument is found.
Returns with the return code of the option handler, if one was called.
Deletes command line arguments from argv list as they are found, and decrements
argc accordingly.
Does not show "invisible" options in usage or help messages.
Assumes the program name is contained in argv[0].
These behaviors may be controlled through the
mode argument.
Redacted form: General:
plparseopts(argv, mode) Perl/PDL: Not available?
This function is used in all of the examples.
ARGUMENTS¶
- p_argc (int *, input)
- pointer to number of arguments.
- argv (const char **, input)
- Pointer to character array containing *p_argc command-line
arguments.
- mode (PLINT, input)
- Parsing mode with the following possibilities: PL_PARSE_FULL (1) -- Full
parsing of command line and all error messages enabled, including program
exit when an error occurs. Anything on the command line that isn't
recognized as a valid option or option argument is flagged as an error.
PL_PARSE_QUIET (2) -- Turns off all output except in the case of errors.
PL_PARSE_NODELETE (4) -- Turns off deletion of processed arguments.
PL_PARSE_SHOWALL (8) -- Show invisible options PL_PARSE_NOPROGRAM (32) --
Specified if argv[0] is NOT a pointer to the program name. PL_PARSE_NODASH
(64) -- Set if leading dash is NOT required. PL_PARSE_SKIP (128) -- Set to
quietly skip over any unrecognized arguments.
AUTHORS¶
Many developers (who are credited at
http://plplot.sourceforge.net/credits.php)
have contributed to PLplot over its long history.
SEE ALSO¶
PLplot documentation at
http://plplot.sourceforge.net/documentation.php.
